Solution - Simplification or other simple results

Step  1  :

             1
 Simplify   ——
            18

Equation at the end of step  1  :

  71    1
  —— • ——
  4    18

Step  2  :

            71
 Simplify   ——
            4 

Equation at the end of step  2  :

  71    1
  —— • ——
  4    18

Step  3  :

Final result :

  71           
  —— = 0.98611 
  72